Ryan is Managing Partner of the firm’s Madison office. He focuses his nationwide practice on corporate counseling and complex commercial litigation, in both trial and appellate courts, in a wide variety of areas, including labor and employment, antitrust, class actions, contracts, constitutional law, corporate governance, land use, government regulation, environmental, ERISA, and products liability. Over his career, Ryan has maintained a perfect win record in all of the cases to have resolved while he managed the litigation either for plaintiffs or defendants.
In private practice and in his previous role as Wisconsin’s Chief Deputy Solicitor General, Ryan has secured numerous victories in the Supreme Court of the United States—including three pre-certiorari injunctions pending appeal, which are rare—and in multiple federal and state courts of appeal and trial courts. He also has built national, bipartisan coalitions of states and interest groups in support of several lawsuits and briefing efforts, including a 12-state coalition whose suit against the Federal Communications Commission prompted it to reverse a major new rule.
Earlier in his career, Ryan worked in Washington D.C. in an elite complex-litigation practice group of an Am Law 10 firm.
Ryan also served as a law clerk on the U.S. Supreme Court for the Honorable Antonin Scalia and on the U.S. Court of Appeals for the Ninth Circuit for the Honorable Diarmuid F. O’Scannlain.
Ryan was named to Forbes’ “30 Under 30: Law and Policy” list in 2017. His briefing has won awards from the National Association of Attorneys General and the International Municipal Lawyers Association. He has also won three “best brief” accolades from the State Bar of Wisconsin, the most of any lawyer in the competition’s history.
O’Leary v. Humana, Inc. (E.D. WI) - Representing Humana in wage-and-hour collective action under the Fair Labor Standards Act.
- Wisconsin Manufacturers & Commerce v. Evers (Waukesha Cnty. Cir. Ct.) – Obtained an injunction on behalf of WMC and other business groups preventing the State’s planned release of names of Wisconsin businesses with two or more employees to have tested positive for COVID-19.
- Country Visions Cooperative v. Archer-Daniels-Midland Company (Wis. Sup. Ct.) – Representing Archer-Daniels-Midland Company and United Cooperative in dispute over right-of-first-refusal contract on grain facility.
- Day v. Humana, Inc. (N.D. Ill.) – Representing Humana in putative class action alleging breach of fiduciary duties and wrongful denial of benefits under the Employee Retirement Income Security Act of 1974.
- In re Interior Molded Doors Antitrust Litigation (E.D. Va.) – Defending Masonite Corporation in actions alleging price-fixing in the market for interior molded doors.
- National Climate-Change Litigation (1st Cir., 4th Cir., 9th Cir.) – Defending CITGO Petroleum Corporation in cases filed across the United States alleging that a number of fossil fuel companies are responsible for various injuries caused by climate change.
- Crystallex v. Petróleos de Venezuela, S.A. (D. Del.) – Representing intervenor CITGO Petroleum Corporation in Foreign Sovereign Immunity Act case in which plaintiff seeks to recover over $1.4 billion.
- City of Green Bay v. Bostelmann (E.D. Wis.) – Served as chief counsel for intervenor Wisconsin State Legislature in a lawsuit seeking to delay a statewide election; succeeded in persuading court to dismiss for lack of subject-matter jurisdiction.
- Wisconsin Legislature v. Palm (Wis. Sup. Ct.) – Served as chief counsel for Wisconsin Legislature in successful original action seeking invalidation of an agency lockdown order on the ground that it was issued improperly under the state Administrative Procedure Act.
- Wisconsin Legislature v. Evers (Wis. Sup. Ct.) – Served as chief counsel for Wisconsin Legislature in successful original action seeking invalidation of an executive order purporting to cancel a statutorily required statewide election.
- Counseling highly ranked private college on federal and state law concerning religious institutions.
- Counseling corporate executive in an action for judicial dissolution based on shareholder oppression.
- Counseling international manufacturer on briefing strategy in products-liability cases filed throughout the United States.
- Represented numerous amici in state and federal appellate courts (including the Supreme Court) on myriad legal topics, including intellectual property, federal criminal law, constitutional law, and Section 1983.
Honors & Recognitions
- Forbes 30 Under 30: Law and Policy (2017)
- Best Brief, State Bar of Wisconsin (2018) (International Union of Operating Engineers v. Schimel)
- Best Brief, National Association of Attorneys General (2018) (Gill v. Whitford)
- Amicus Service Award, International Municipal Lawyers Association (2020) (for pro bono brief in Seventh Circuit)
- Best Brief, State Bar of Wisconsin (2020) (Porter v. Wisconsin)
- Best Brief, State Bar of Wisconsin (2020) (Minerva Dairy v. Harsdorf)
- "Graduate of the Last Decade" Alumni Award, Hillsdale College (2013)
- Eimer Stahl Attorneys Successfully Help Reverse District Court Decision in United States v. DingwallAugust 18, 2021
- Ryan Walsh Talks to Wisconsin Public Radio About Whether States Should Release Names of Businesses Connected to COVID-19 CasesOctober 8, 2020
- Amy Miller and Ryan Walsh File Important Seventh Circuit Brief on Behalf of End Domestic Abuse Wisconsin and the Wisconsin Coalition Against Domestic AbuseSeptember 30, 2020
- July 17, 2020
- July 15, 2020
- July 15, 2020
- January 6, 2020
- March 18, 2019
- EimerStahl Insights, June 2, 2020
- July 2011
What Clients Say
What Clients Say
- “Ryan is an exceptionally dedicated, creative, and insightful attorney. Throughout complicated litigation and under tight timelines, he never missed a detail and answered all of our questions with remarkable patience and understanding. His service is second to none.”
- “Ryan not only provided outstanding legal advice but also was engaged and listened to my concerns. His professionalism, knowledge, and support were invaluable. I have recommended—and will continue to recommend—Ryan.”
- "Ryan is a great writer and great strategic thinker. Unlike many lawyers, he adapts quickly to changing conditions and, unlike most litigators, works tirelessly to avoid going to court. Ryan restrains the inner warrior just enough to fulfill Sun Tzu’s vision of supreme victory, but he always keeps the sword sharp and is ready for a good battle."
- J.D., University of Chicago Law School
- with high honors
- Order of the Coif
- Kirkland & Ellis Scholar
- Editor-in-Chief, University of Chicago Law Review
- Hillsdale College
- summa cum laude
- Senior Class President
- Law Clerk to the Honorable Antonin Scalia, Supreme Court of the United States
- Law Clerk to the Honorable Diarmuid F. O’Scannlain, United States Court of Appeals for the Ninth Circuit
- District of Columbia
- U.S. District Court for the District of Columbia
- U.S. District Court for the Eastern District of Wisconsin
- U.S. District Court for the Western District of Wisconsin
- U.S. Court of Appeals for the Fourth Circuit
- U.S. Court of Appeals for the Sixth Circuit
- U.S. Court of Appeals for the Seventh Circuit
- U.S. Court of Appeals for the Ninth Circuit
- U.S. Court of Appeals for the District of Columbia Circuit
- U.S. Supreme Court